Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 75
will show that an equal length of bamboo is decidedlypreferable. The inner half of a round solid stick does com-paratively little in holding up a burden; to remove that half istherefore as gainful as to strip from a joist the timber surround-ing its working skeleton. At first the journals or axles… … Solid rubber cylinder sags much.Hollow rubber cylinder sags less. comes out when we take two cylinders of rubber, alike in lengthand weight, one solid, the other hollow. Supporting both at theirends, the hollow form sags less than the solid form, proving it-self to be the more rigid of the two.…
Inventions · Inventors
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-483-254.webp)
